src/share/vm/opto/library_call.cpp

*** 2469,2478 ****
--- 2469,2500 ----
        // the one that guards them: pin the Load node
        p = make_load(control(), adr, value_type, type, adr_type, mo, LoadNode::Pinned, requires_atomic_access, unaligned, mismatched);
        // load value
        switch (type) {
        case T_BOOLEAN:
+       {
+         // Normalize the value returned by getBoolean in the following cases
+         if (mismatched ||
+             heap_base_oop == top() ||                            // - heap_base_oop is NULL or
+             (can_access_non_heap && alias_type->field() == NULL) // - heap_base_oop is potentially NULL
+                                                                  //   and the unsafe access is made to large offset
+                                                                  //   (i.e., larger than the maximum offset necessary for any
+                                                                  //   field access)
+             ) {
+           IdealKit ideal = IdealKit(this);
+ #define __ ideal.
+           IdealVariable normalized_result(ideal);
+           __ declarations_done();
+           __ set(normalized_result, p);
+           __ if_then(p, BoolTest::ne, ideal.ConI(0));
+           __ set(normalized_result, ideal.ConI(1));
+           ideal.end_if();
+           final_sync(ideal);
+           p = __ value(normalized_result);
+ #undef __
+         }
+       }
        case T_CHAR:
        case T_BYTE:
        case T_SHORT:
        case T_INT:
        case T_LONG: